Evidence map›Paper›PMID 34055624›Full record

ArticleFrontiers in oncology2021

Establishment and Initial Experience of Clinical FLASH Radiotherapy in Canine Cancer Patients.

Elise Konradsson, Maja L Arendt, Kristine Bastholm Jensen, Betina Børresen, Anders E Hansen, Sven Bäck, Annemarie T Kristensen, Per Munck Af Rosenschöld, Crister Ceberg, Kristoffer Petersson

Open access · goldAbstract read
In one paragraph

Article in Frontiers in oncology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 61 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
61citing papers in PubMed, 5 pooled it
20.0field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

61 citing papers in PubMed, 5 syntheses or guidelines pooled it, 100 citations in OpenAlex.

  1. Pooled it
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  4. The current status of FLASH particle therapy: a systematic review.Physical and engineering sciences in medicine · 2023
    Pooled it
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  6. Deciphering Ultra-High Dose Rate Irradiation withAntioxidants (Basel, Switzerland) · 2026
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1 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors at 5 institutions in 3 countries.

Elise KonradssonMedical Radiation Physics, Department of Clinical Sciences, Lund University, Lund, Sweden.
Maja L ArendtDepartment of Veterinary Clinical Sciences, University of Copenhagen, Frederiksberg, Denmark.
Kristine Bastholm JensenVeterinärhuset Öresund, Limhamn, Sweden.
Betina BørresenDepartment of Veterinary Clinical Sciences, University of Copenhagen, Frederiksberg, Denmark.
Anders E HansenDepartment of Biotherapeutic Engineering and Drug Targeting, DTU Health Tech, Kgs, Technical University of Denmark, Lyngby, Denmark.
Sven BäckRadiation Physics, Department of Hematology, Oncology and Radiation Physics, Skåne University Hospital, Lund, Sweden.
Annemarie T KristensenDepartment of Veterinary Clinical Sciences, University of Copenhagen, Frederiksberg, Denmark.
Per Munck Af RosenschöldRadiation Physics, Department of Hematology, Oncology and Radiation Physics, Skåne University Hospital, Lund, Sweden.
Crister CebergMedical Radiation Physics, Department of Clinical Sciences, Lund University, Lund, Sweden.
Kristoffer PeterssonRadiation Physics, Department of Hematology, Oncology and Radiation Physics, Skåne University Hospital, Lund, Sweden.
University of Copenhagen · DKLund University · SESkåne University Hospital · SETechnical University of Denmark · DKUniversity of Oxford · GB

Funding

Medical Research Council MC_UU_00001/9
6 · The paper itself

Abstract

FLASH radiotherapy has emerged as a treatment technique with great potential to increase the differential effect between normal tissue toxicity and tumor response compared to conventional radiotherapy. To evaluate the feasibility of FLASH radiotherapy in a relevant clinical setting, we have commenced a feasibility and safety study of FLASH radiotherapy in canine cancer patients with spontaneous superficial solid tumors or microscopic residual disease, using the electron beam of our modified clinical linear accelerator. The setup for FLASH radiotherapy was established using a short electron applicator with a nominal source-to-surface distance of 70 cm and custom-made Cerrobend blocks for collimation. The beam was characterized by measuring dose profiles and depth dose curves for various field sizes. Ten canine cancer patients were included in this initial study; seven patients with nine solid superficial tumors and three patients with microscopic disease. The administered dose ranged from 15 to 35 Gy. To ensure correct delivery of the prescribed dose, film measurements were performed prior to and during treatment, and a Farmer-type ion-chamber was used for monitoring. Treatments were found to be feasible, with partial response, complete response or stable disease recorded in 11/13 irradiated tumors. Adverse events observed at follow-up ranging from 3-6 months were mild and consisted of local alopecia, leukotricia, dry desquamation, mild erythema or swelling. One patient receiving a 35 Gy dose to the nasal planum, had a grade 3 skin adverse event. Dosimetric procedures, safety and an efficient clincal workflow for FLASH radiotherapy was established. The experience from this initial study will be used as a basis for a veterinary phase I/II clinical trial with more specific patient inclusion selection, and subsequently for human trials.

Indexed as

canine cancer patientsdosimetryflashnormal tissueradiation oncologyradiotherapyultra-high dose rate

Identifiers

PMID34055624
PMCPMC8155542
OpenAlexW3162927612

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.